How long to make the message remain onscreen before it goes away.
If another message is drawn while an old message is still displaying,
both messages remain, the new message scrolls up the old message.

style

Where to show the message on the screen:
- 1 = upper left
- 2 = upper center
- 3 = lower right
- 4 = lower center
Note that all these locations have their own defined slightly
different fonts and default sizes, enforced by the stock KSP game.

size

A number describing the font point size: NOTE that the actual size
varies depending on which of the above styles you’re using. Some
of the locations have a magnifying factor attached to their fonts.